Chapter 23 Magnetic field Flashcards
1
Q
what is a magnetic field?
A
a region of space in which moved charged particles are subject to a magnetic force.
2
Q
what two things could magnetic fields be caused by?
A
due to moving charges
or
permanent magnets
3
Q
In a wire carrying current, what are the flowing electrons?
A
moving charges
4
Q
what is a permanent magnet?
A
an object made from a magnetised material that creates its own persistent magnetic field.
5
Q
what do magnetic field lines map?
A
the magnetic field patterns
6
Q
explain the magnetic field lines for a long straight current-carrying conductor
A
always away from positive
7
Q
explain the magnetic field for a flat coil
A
8
Q
explain the magnetic field for a long solenoid
A
9
Q
explain Fleming’s left hand rule
F.B.I
A
F - Force
B - Magnetic flux density
I - current
